Engine is making a super loud noise when accelerating

[Dalakian]

So here's the deal. The car idles very smoothly and drives good up until the "Boost" meter starts filling up (when I floor the pedal). All of the sudden, I hear a really loud rattling noise. Sounds like the end of the world, I swear. To be more specific, it sounds like as if there is a lot of rocks inside my engine. I blame the supercharger, but I could be wrong.

Has anyone ever faced the same problem before? I've heard of the infamous coupler issue which I'm going to replace anyways, but I don't think that it's the coupler that's making such a loud noise. Can anyone suggest what exactly needs to be replaced? Or maybe there a link to a supercharger rebuild/clean DIY somewhere?

The car has 90,000 on it and has had the transmission replaced already by the previous owner. Also, the oil pan is leaking, probably just the gasket that needs to be replaced. Maybe now is a good time to replaced the oil pump as well, huh?

Thanks in advance!!

Oh, and here's a video of the sound: http://youtu.be/eHPwJLWbQ-4

 

[blueguy]

Could easily be the supercharger coupler.

Get a video of it...or, take off the supercharger belt and see if the sound keeps up when you give it the beans.

 

[Dalakian]

Could easily be the supercharger coupler.

Get a video of it...or, take off the supercharger belt and see if the sound keeps up when you give it the beans.

You're right, here's the video that I've just made - 1999 Grand Prix GTP - loud noise when running - YouTube

Please advise!

Also, I have the following trouble-codes popping up:

P0171
P0650
P0716
P0717

As far as my research goes, 1 of them is for the actual "Check Engine" light which is missing due to the previous owner, the others are for some speed sensor and the first one is for "System Too Lean"

Thanks!

 

[Dalakian]

Also, do you suggest that I buy the ZZPerformance coupler + oil or all stock/GM?

 

[Scottydoggs]

https://www.google.com/search?sugexp=chrome,mod=11&sourceid=chrome&ie=UTF-8&q=P0171

[URL]https://www.google.com/search?sugexp=chrome,mod=11&sourceid=chrome&ie=UTF-8&q=P0650

https://www.google.com/search?sugexp=chrome,mod=11&sourceid=chrome&ie=UTF-8&q=P0717[/URL]

https://www.google.com/search?sugexp=chrome,mod=11&sourceid=chrome&ie=UTF-8&q=P0716

 

[blueguy]

The first code is a vacuum leak...

Find that, and fix it.

 

[Dalakian]

The first code is a vacuum leak...

Find that, and fix it.

Thanks for advise. Going to take care of the vacuum leak asap. The problem with the supercharger still remains though. Waiting for my new coupler to arrive.